#include<stdio.h>
#include<string.h>
#include"malloc.h"
# define MAXWORD 100
typedef struct tnode{
    char ch; 
    int count;
    struct tnode *lchild,*rchild;

}BSTNode;
void CreateBST(BSTNode *&bt,char c)
{
    if(bt==NULL)
    {
        bt=(BSTNode*)malloc(sizeof(BSTNode));
        bt->ch=c;
        bt->count=1;
        bt->lchild=bt->rchild=NULL;
    }
    else if(c==bt->ch)
     bt->count++;
     else if()
}